undamentalytics Newsletter

Mills Jason Fahr: insider trades

Director at Expensify, Inc. No open-market purchases and 9 sales not made under a pre-set plan, reported from December 1, 2023 to September 24, 2025.

What happened after Mills Jason Fahr’s sales?

None of these trades can be measured yet: either the window after the report has not finished or the share price was under $5 when it was reported.

With 296 insiders tested, some will look skilled or unskilled by chance alone: when we replaced each insider’s stocks with random companies bought on the same days, about 5.7 cleared the bar ahead and 23.3 behind. One record on its own proves little.

Trade by trade

Mills Jason Fahr: trades against the S&P 500 afterwards
MeasuredTrades countedAverage vs S&P 500MedianWent the right wayYearst-statisticp-valueEvidence
Purchases, 3 months after the report 0 — — — — — — Not enough years
Purchases, 6 months after the report 0 — — — — — — Not enough years
Purchases, 12 months after the report 0 — — — — — — Not enough years
Purchases, 12 months after the trade 0 — — — — — — Not enough years
Sales, 3 months after the report 0 — — — — — — Not enough years
Sales, 12 months after the report 0 — — — — — — Not enough years
Sales, 12 months after the trade 0 — — — — — — Not enough years

“Average vs S&P 500” is the stock’s return including dividends minus the index’s over the same dates, from the close on the first trading day after the report, or from the close on the trade date. Only windows that have finished are counted. For sales, a negative figure means the stock lagged after it was sold, so selling was the right call (green). “Went the right way” is the share of purchases that beat the index, or of sales that trailed it. The t-statistic uses one average per year of reports, because one person’s trades bunch into the same stock and weeks, and needs trades in at least four different years; the p-value comes from the t distribution with that number of years (with four years, a t of 2 has p = 0.14). “Some evidence” means p under 5%, “strong evidence” p under 1% over at least six years.

Companies traded

CompanyTitle on the latest filingPurchasesSalesFirst reportLatest report
Expensify, Inc. EXFY —09December 1, 2023September 24, 2025

Trades and what followed

Moves are against the S&P 500; green means the trade went the insider’s way.

ReportedTradedCompanyTradeValue3 months after report12 months after report12 months after trade
September 24, 2025September 16, 2025 EXFY Sale $12,883 not yetnot yetnot yet
April 24, 2025March 19, 2025 EXFY Sale $18,948 not yetnot yetnot yet
December 18, 2024December 16, 2024 EXFY Sale $20,002 not yetnot yetnot yet
December 9, 2024December 6, 2024 EXFY Sale $12,253 not yetnot yetnot yet
September 19, 2024September 16, 2024 EXFY Sale $11,362 not yetnot yetnot yet
August 30, 2024August 28, 2024 EXFY Sale $12,093 not yetnot yetnot yet
June 6, 2024June 3, 2024 EXFY Sale $10,188 not yetnot yetnot yet
March 14, 2024March 11, 2024 EXFY Sale $12,699 not yetnot yetnot yet
December 1, 2023November 30, 2023 EXFY Sale $21,001 not yetnot yetnot yet

Open-market purchases and sales of at least $10,000 in companies we cover, from SEC Form 4 filings; sales made under a pre-set Rule 10b5-1 plan are not shown. “Not yet” means the window has not finished or the share price was under $5 at entry. These are the shares’ moves after each trade: they say nothing about why Mills Jason Fahr traded and do not suggest the use of non-public information. How every insider compares · the insider trading backtest.